ME 190 Mechanical Systems DesignPneumatics Lab 1Week 1 Familiarization with simple pneumaticsLearning ObjectivesThe student who successfully completes this lab will be able to: Identify and explain the function of a lubricator in the conditioning stage of a pneumatic Identify and explain the function of a filter Identify and explain the function of a regulator Identify the types of pneumatic actuators from their schematic symbols Explain the difference between single-acting and double-acting cylinders Identify and explain the function of manual , air piloted, and solenoid valves Draw schematic symbols for pneumatic components Draw the schematic of a simple pneumatic circuit Build simple pneumatic circuits based on given schematic Describe the function of air logic circuits Identify applications for air logic circuits Explain the direction of air flow within a pneumatic circuit Trouble shoot any faults that occur in the construction or operation of a pneumatic circuit

Equipment (typical example components from SMC are listed in parentheses) Manual switch (VHK2-04F-04F) Shuttle valve (VR1210F-04) T-valve (KQ2T04-00A) Two 3/2 NC single solenoid valves (SYJ512-5LZD-M5) 5/2 NC single solenoid valve (SYJ5220-5LZD-C4) Speed controller (AS20002F-04) Double acting cylinder 4 mm diameter pneumatic tubing (TU0604BU-100) 5, 12, or 24 V power supply ULN2803 Octal driver Solderless breadboard

ProcedureThis manual is written to walk through the first pneumatic experiment with students. The experiment is divided into three sections to get students familiar with simple pneumatics and give them different kinds of learning experiences. It will demonstrate the basic operations of simple pneumatic components. It will also help you apply what you have learned in lectures about pneumatics and show you the various possibilities of pneumatic systems. However, pneumatic systems operate with pressurized air and they require safe and responsible handling in the laboratory. Careless handling may hurt people and damage components. Please be careful with the components and follow instructions.When you are doing this lab, build the pneumatic circuits following the steps below and make observations on how the actuators react to input signals. Take notes where needed for post-lab report.

Part 11. Build the circuit using pneumatic tubing and components provideda. Get five 10-inch pneumatic tubingb. Connect the air input to a manual switchc. Connect the manual switch to the input of the manifoldd. Connect the output of a 3/2 solenoid valve to a speed controllere. Connect the output of the speed controller to one of the inputs of the double acting cylinderf. Connect the output of another 3/2 solenoid valve directly to the other input of the double acting cylinder2. Interface the Arduino with solenoid valves using the ULN2803 octal drivera. Plug the ULN2803 octal driver onto the breadboardb. Connect the Arduino digital signal outputs to the inputs of the ULN2803 octal driverc. Plug the ground legs of the solenoid valves into the outputs of the ULN2803 octal driverd. Connect the positive legs of the solenoid valves to the positive port of the power supplye. Also connect the COM port of the ULN2803 octal driver to the positive port of the power supplyf. Ground the Arduino, the ULN2803 octal driver, as well as the power supply

3. Make sure all the tubing is deeply enough inserted into the fittings, and then adjust the regulator to desired pressure4. Turn on the manual switch and let air flow through the system5. Study the circuit and make observations on the cylinder and the valves6. Activate one of the solenoid valves by modifying the example sketch Blink or the sample code attached in the appendix and make observations on the cylinder and the valves7. Activate the other solenoid valve while deactivating the previous one and make observations on the cylinder and the valves8. Activate both solenoid valves and make observations on the cylinder and the valves9. Play with the speed controller and notice changes made to the movement of the cylinder10. Close the manual switch11. Disassemble the circuit12. Fill out the truth table below based on the observations you makeInput 1Input 2Output

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Part 21. Build the circuit using pneumatic tubing and components provideda. Get five 10-inch pneumatic tubingb. Connect input to a manual switchc. Connect the manual switch to the manifoldd. Connect an output of the 3/2 solenoid valve to the input of a portable 5/2 solenoid valvee. Connect the two outputs of the 5/2 solenoid valve to the double acting cylinder2. Repeat steps 2 to 12 from part 1Input 1Input 2Output

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Part 31. Build the circuit using pneumatic tubing and components provideda. Get seven 10-inch pneumatic tubingb. Connect input to a manual switchc. Connect the manual switch to the manifoldd. Connect the outputs of the two 3/2 solenoid valves to the input of a shuttle valvee. Connect the output of the shuttle valve to the input of a portable 5/2 solenoid valvef. Connect the two outputs of the 5/2 solenoid valve to the double acting cylinder2. Repeat steps 2 to 12 from part 1Input 1Input 2Input 3Output

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DeliverablesA lab report should be generated consisting of the following items, but not limited to, after this lab. Circuit diagrams with formal ISO symbols Each circuit element should be labeled with an unique item number Step-by-step operations for circuits using item numbers Questions to be answered What is the function of a filter? What is the function of a regulator? What is the function of a dryer? What is difference between a single-acting cylinder and a double-acting cylinder? What is the function of a solenoid valve? What logical functions did the circuits execute? What are some applications for these circuits? A truth table for each of the circuits Fully documented code and circuit schematic.

Appendix- Arduino code for driving solenoid valves

int solenoid = 13;

// the setup routine runs once when you press reset:void setup() { // initialize the digital pin as an output. pinMode(solenoid, OUTPUT); }

// the loop routine runs over and over again forever:void loop() { digitalWrite(solenoid, HIGH); // turn on delay(1000); // the delay before it turns off digitalWrite(solenoid, LOW); // turn off delay(1000); // the delay before it turns back on}Page 3 of 7San Jos State University Department of Mechanical Engineeringrev 0.108AUG2013